• All-metal end ring seal design for maximum service life. The industry standard for over 75 years.
• Provides 300% greater lubricant capacity than o-ring style couplings.
• Greater lubricant capacity allows longer periods between scheduled lubrications and longer service life.
• Straight tooth design provides improved load distribution, lower stresses and longer life for the gear teeth.

Technical Specifications

Coupling Size	3.5
Model Name	1-5-7_FR
Bore Type	Rough Bore
Length Through Bore (in)	4.03125 in
Max Bore w/standard key for Flex Hub	3.75 in
Coupling Type	Gear Coupling
Rating HP @ 100 RPM	235
Material	Medium Carbon Steel
Fastener Quantity	8
Tooth Profile	Straight Faced Involute Hub tooth
Outside Diameter (in)	11 in
Bolt Type	Exposed
Hub Diameter (in)	7.75 in
Compatible Bore Size [Min] (in)	0 in
Style	FASTS
Torque [Max] (in-lb)	296,000 in/lbs
Configuration	Flex Rigid
Speed Max (rpm)	6,000 rpm
Lube/Non-Lube	Lubricated
Compatible Bore Size Flex Hub [Min] (in)	0 in
Torque Rating (in-lb)	148,000 in/lbs
Measurement System	Imperial
Compatible Bore Size Rigid Hub [Min] (in)	2.25 in
Overall Length (in)	8.5 in
Bolt Circle	9.5 in
Temperature Range	-40 to +190 °F
Sleeve Type	Flanged
Maximum Operating Angular Misalignment	0.5 °
Features	Exposed Bolt / Flex Rigid Coupling
Performance	Lubrication Hole
Includes	Hubs (1) Sleeve (1) Rigid (1) Seal (2)
Fastener Size	3/4 x 3 3/8
Bore Size Max (in)	3.75 in

General Specifications

UPC	662384010312
Weight	127.34 LB